Former President Donald Trump’s key defense in his hush money trial, now underway in Manhattan, is likely to present a major problem as the case unfolds, a legal analyst revealed Monday. Former prosecutor Maya Wiley appeared on MSNBC to explain the pitfall Trump may stumble into as he tries to discredit Manhattan District Attorney Alvin Bragg’s star witness, Michael Cohen. While Cohen is expected to testify that he orchestrated payments made to adult film star Stormy Daniels ahead of the 2016 presidential election and then was reimbursed after Trump claimed the White House, Trump, who pleaded …